Continuous Water Pump Leak PLEASE Help

Hello everyone
I'm hoping someone can help us figure this out, we have a 2013 Mazda 2 Touring that is in good condition and taken care of.
About a year ago the Water Pump started leaking and we had it replaced by our local shop that has been our got to for
working on this car.
Everything was fine for about a year and then the radiator started to leak so that was replaced along with the thermostat and new radiator cap.
A few months down the road and the water pump started leaking again from the seal to the block so they replaced it.

A few months later the Radiator for some reason backed all its fluid into the overflow reservoir and started leaking out of the radiator cap.
We took it in and they checked for electrolysis and pressure tested everything so no head gasket or other leaks found.

They simply replaced the radiator cap and that seemed to work for a while, but then stated leaking again so they replaced it with another
one and that seems to have done the trick for a while.

Unfortunately after that the water pump stated leaking again this time from the from the the front bleed hole and it sprays a line of coolant around
the area (as seen in the pictures) so they replaced it.
Then a few months later the Water pump was again leaking from the front bleed hole so they replaced it again.

According to the service bulletin these pumps can put off a small amount of steam/coolant but not so much that it drips or would be considered leaking.
Our water pump is actually leaking not just putting off a small amount of steam as is noted in the service bulletin about this issue with these particular pumps.
So they Replaced it and literally after only a few months it again has started leaking form the front bleed hole.

It seem no matter what we do the water pump is leaking form its bleed hole and again it is not the small amount of steam as noted int eh service bulletin
it is actually leaking and fitting their description of a failing water pump.

I need to know if anyone else has experienced this and if they found a solution because the shop has warranted their work but now we are getting at the point that they can not figure out what is causing it.

Currently they have put Zerex Asian Blue Coolant in it and I have asked them to Put Actual Mazda FL22 Green Coolant back in there to see if that will change anything as the dealership said if not using factory coolant that "could" be an issue although not likely.

Could the Radiator actually be bad and the water pump is the weak point of failure?

There is NO oil in the coolant or coolant in the oil those are completely clean so the thought of a head gasket issue doesn't seem likely but I'm wondering if there could be a small leak that is pressurizing the cooling system and over heating it BUT the Temperature Lights NEVER go on and even the shop has checked the temperature and it doesn't seem to be over heating.
We thought we were just getting some bad water pumps but we are going on the 4th one in a 2 year period and this is getting absurd.

I'm attaching images as well as the images of the service bulletin description SB-10092584-6903

PLEASE if anyone has any ideas post away!
sincerely
Mazda213
 

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